isa_lpt.fit.eqn

这也是8255的设计,不知道是否好使,希望得到验证

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--A1L63 is LPT_ACK_CS~153 at LCCOMB_X5_Y13_N10
A1L63 = !ISA_AEN & ISA_A[3] & !ISA_A[14] & ISA_A[8];


--A1L64 is LPT_ACK_CS~154 at LCCOMB_X5_Y13_N22
A1L64 = !ISA_A[19] & ISA_A[9] & !ISA_A[13] & !ISA_A[16];


--A1L65 is LPT_ACK_CS~155 at LCCOMB_X5_Y13_N20
A1L65 = !ISA_A[10] & !ISA_A[2] & ISA_A[4] & !ISA_A[18];


--A1L66 is LPT_ACK_CS~156 at LCCOMB_X5_Y13_N12
A1L66 = !ISA_A[17] & !ISA_A[11] & !ISA_A[15] & !ISA_A[7];


--A1L67 is LPT_ACK_CS~157 at LCCOMB_X5_Y13_N24
A1L67 = A1L63 & A1L64 & A1L65 & A1L66;


--A1L68 is LPT_ACK_CS~158 at LCCOMB_X5_Y13_N4
A1L68 = A1L67 & ISA_A[6] & !ISA_A[12] & ISA_A[5];


--LPT_STOB_CS is LPT_STOB_CS at LCCOMB_X5_Y13_N28
LPT_STOB_CS = ISA_A[0] & A1L68 & !ISA_A[1] & !ISA_IOW;


--DATA_reg[0] is DATA_reg[0] at LCFF_X8_Y10_N1
DATA_reg[0] = DFFEAS(A1L3, GLOBAL(A1L73),  ,  ,  ,  ,  ,  ,  );


--DATA_reg[1] is DATA_reg[1] at LCFF_X1_Y6_N17
DATA_reg[1] = DFFEAS(A1L5, GLOBAL(A1L73),  ,  ,  ,  ,  ,  ,  );


--DATA_reg[2] is DATA_reg[2] at LCFF_X7_Y6_N17
DATA_reg[2] = DFFEAS(A1L7, GLOBAL(A1L73),  ,  ,  ,  ,  ,  ,  );


--DATA_reg[3] is DATA_reg[3] at LCFF_X26_Y5_N17
DATA_reg[3] = DFFEAS(UNCONNECTED_DATAIN, GLOBAL(A1L73),  ,  ,  , A1L48,  ,  , VCC);


--DATA_reg[4] is DATA_reg[4] at LCFF_X4_Y2_N29
DATA_reg[4] = DFFEAS(UNCONNECTED_DATAIN, GLOBAL(A1L73),  ,  ,  , A1L50,  ,  , VCC);


--DATA_reg[5] is DATA_reg[5] at LCFF_X26_Y4_N1
DATA_reg[5] = DFFEAS(A1L11, GLOBAL(A1L73),  ,  ,  ,  ,  ,  ,  );


--DATA_reg[6] is DATA_reg[6] at LCFF_X25_Y1_N9
DATA_reg[6] = DFFEAS(UNCONNECTED_DATAIN, GLOBAL(A1L73),  ,  ,  , A1L54,  ,  , VCC);


--DATA_reg[7] is DATA_reg[7] at LCFF_X5_Y11_N21
DATA_reg[7] = DFFEAS(A1L14, GLOBAL(A1L73),  ,  ,  ,  ,  ,  ,  );


--A1L72 is LPT_DATA_CS~1 at LCCOMB_X5_Y13_N18
A1L72 = ISA_A[0] # ISA_A[1] # ISA_IOW # !A1L68;


--LPT_BUSY_CS is LPT_BUSY_CS at LCCOMB_X5_Y13_N16
LPT_BUSY_CS = !ISA_A[0] & ISA_A[1] & !ISA_IOR & A1L68;


--LPT_ACK_CS is LPT_ACK_CS at LCCOMB_X5_Y13_N8
LPT_ACK_CS = ISA_A[0] & ISA_A[1] & !ISA_IOR & A1L68;


--ISA_RESET is ISA_RESET at PIN_125
--operation mode is input

ISA_RESET = INPUT();


--ISA_A[0] is ISA_A[0] at PIN_120
--operation mode is input

ISA_A[0] = INPUT();


--ISA_A[3] is ISA_A[3] at PIN_115
--operation mode is input

ISA_A[3] = INPUT();


--ISA_A[8] is ISA_A[8] at PIN_103
--operation mode is input

ISA_A[8] = INPUT();


--ISA_AEN is ISA_AEN at PIN_96
--operation mode is input

ISA_AEN = INPUT();


--ISA_A[14] is ISA_A[14] at PIN_137
--operation mode is input

ISA_A[14] = INPUT();


--ISA_A[9] is ISA_A[9] at PIN_101
--operation mode is input

ISA_A[9] = INPUT();


--ISA_A[19] is ISA_A[19] at PIN_132
--operation mode is input

ISA_A[19] = INPUT();


--ISA_A[16] is ISA_A[16] at PIN_135
--operation mode is input

ISA_A[16] = INPUT();


--ISA_A[13] is ISA_A[13] at PIN_139
--operation mode is input

ISA_A[13] = INPUT();


--ISA_A[4] is ISA_A[4] at PIN_114
--operation mode is input

ISA_A[4] = INPUT();


--ISA_A[18] is ISA_A[18] at PIN_133
--operation mode is input

ISA_A[18] = INPUT();


--ISA_A[2] is ISA_A[2] at PIN_118
--operation mode is input

ISA_A[2] = INPUT();


--ISA_A[10] is ISA_A[10] at PIN_143
--operation mode is input

ISA_A[10] = INPUT();


--ISA_A[17] is ISA_A[17] at PIN_134
--operation mode is input

ISA_A[17] = INPUT();


--ISA_A[15] is ISA_A[15] at PIN_136
--operation mode is input

ISA_A[15] = INPUT();


--ISA_A[7] is ISA_A[7] at PIN_104
--operation mode is input

ISA_A[7] = INPUT();


--ISA_A[11] is ISA_A[11] at PIN_142
--operation mode is input

ISA_A[11] = INPUT();


--ISA_A[5] is ISA_A[5] at PIN_113
--operation mode is input

ISA_A[5] = INPUT();


--ISA_A[6] is ISA_A[6] at PIN_112
--operation mode is input

ISA_A[6] = INPUT();


--ISA_A[12] is ISA_A[12] at PIN_141
--operation mode is input

ISA_A[12] = INPUT();


--ISA_A[1] is ISA_A[1] at PIN_119
--operation mode is input

ISA_A[1] = INPUT();


--ISA_IOW is ISA_IOW at PIN_94
--operation mode is input

ISA_IOW = INPUT();


--LPT_BUSY is LPT_BUSY at PIN_43
--operation mode is input

LPT_BUSY = INPUT();


--ISA_IOR is ISA_IOR at PIN_93
--operation mode is input

ISA_IOR = INPUT();


--LPT_ACK is LPT_ACK at PIN_42
--operation mode is input

LPT_ACK = INPUT();


--LPT_RESET is LPT_RESET at PIN_53
--operation mode is output

LPT_RESET = OUTPUT(GND);


--LPT_STOB is LPT_STOB at PIN_55
--operation mode is output

LPT_STOB = OUTPUT(!LPT_STOB_CS);


--LPT_D[0] is LPT_D[0] at PIN_9
--operation mode is output

LPT_D[0] = OUTPUT(DATA_reg[0]);


--LPT_D[1] is LPT_D[1] at PIN_24
--operation mode is output

LPT_D[1] = OUTPUT(DATA_reg[1]);


--LPT_D[2] is LPT_D[2] at PIN_25
--operation mode is output

LPT_D[2] = OUTPUT(DATA_reg[2]);


--LPT_D[3] is LPT_D[3] at PIN_28
--operation mode is output

LPT_D[3] = OUTPUT(DATA_reg[3]);


--LPT_D[4] is LPT_D[4] at PIN_30
--operation mode is output

LPT_D[4] = OUTPUT(DATA_reg[4]);


--LPT_D[5] is LPT_D[5] at PIN_31
--operation mode is output

LPT_D[5] = OUTPUT(DATA_reg[5]);


--LPT_D[6] is LPT_D[6] at PIN_32
--operation mode is output

LPT_D[6] = OUTPUT(DATA_reg[6]);


--LPT_D[7] is LPT_D[7] at PIN_8
--operation mode is output

LPT_D[7] = OUTPUT(DATA_reg[7]);


--DIR0 is DIR0 at PIN_52
--operation mode is output

DIR0 = OUTPUT(GND);


--DIR8 is DIR8 at PIN_48
--operation mode is output

DIR8 = OUTPUT(VCC);


--DIR16 is DIR16 at PIN_41
--operation mode is output

DIR16 = OUTPUT(GND);


--a0 is a0 at PIN_57
--operation mode is output

a0 = OUTPUT(GND);


--a1 is a1 at PIN_58
--operation mode is output

a1 = OUTPUT(GND);


--a2 is a2 at PIN_59
--operation mode is output

a2 = OUTPUT(GND);


--a3 is a3 at PIN_60
--operation mode is output

a3 = OUTPUT(GND);


--a4 is a4 at PIN_63
--operation mode is output

a4 = OUTPUT(GND);


--a5 is a5 at PIN_64
--operation mode is output

a5 = OUTPUT(GND);


--A1L42 is ISA_D[0]~7 at PIN_92
--operation mode is bidir

A1L42 = ISA_D[0];

--ISA_D[0] is ISA_D[0] at PIN_92
--operation mode is bidir

ISA_D[0]_tri_out = TRI(LPT_BUSY, LPT_BUSY_CS);
ISA_D[0] = BIDIR(ISA_D[0]_tri_out);


--A1L44 is ISA_D[1]~6 at PIN_87
--operation mode is bidir

A1L44 = ISA_D[1];

--ISA_D[1] is ISA_D[1] at PIN_87
--operation mode is bidir

ISA_D[1]_tri_out = TRI(LPT_ACK, LPT_ACK_CS);
ISA_D[1] = BIDIR(ISA_D[1]_tri_out);


--A1L46 is ISA_D[2]~5 at PIN_86
--operation mode is bidir

A1L46 = ISA_D[2];

--ISA_D[2] is ISA_D[2] at PIN_86
--operation mode is bidir

ISA_D[2] = BIDIR(OPNDRN(VCC));


--A1L48 is ISA_D[3]~4 at PIN_79
--operation mode is bidir

A1L48 = ISA_D[3];

--ISA_D[3] is ISA_D[3] at PIN_79
--operation mode is bidir

ISA_D[3] = BIDIR(OPNDRN(VCC));


--A1L50 is ISA_D[4]~3 at PIN_76
--operation mode is bidir

A1L50 = ISA_D[4];

--ISA_D[4] is ISA_D[4] at PIN_76
--operation mode is bidir

ISA_D[4] = BIDIR(OPNDRN(VCC));


--A1L52 is ISA_D[5]~2 at PIN_75
--operation mode is bidir

A1L52 = ISA_D[5];

--ISA_D[5] is ISA_D[5] at PIN_75
--operation mode is bidir

ISA_D[5] = BIDIR(OPNDRN(VCC));


--A1L54 is ISA_D[6]~1 at PIN_74
--operation mode is bidir

A1L54 = ISA_D[6];

--ISA_D[6] is ISA_D[6] at PIN_74
--operation mode is bidir

ISA_D[6] = BIDIR(OPNDRN(VCC));


--A1L56 is ISA_D[7]~0 at PIN_73
--operation mode is bidir

A1L56 = ISA_D[7];

--ISA_D[7] is ISA_D[7] at PIN_73
--operation mode is bidir

ISA_D[7] = BIDIR(OPNDRN(VCC));


--ISA_READY is ISA_READY at PIN_71
--operation mode is bidir

ISA_READY = BIDIR(OPNDRN(VCC));




--A1L73 is LPT_DATA_CS~1clkctrl at CLKCTRL_G1
A1L73 = cycloneii_clkctrl(.INCLK[0] = A1L72) WITH (clock_type = "Global Clock");


--A1L3 is DATA_reg[0]~feeder at LCCOMB_X8_Y10_N0
A1L3 = A1L42;


--A1L5 is DATA_reg[1]~feeder at LCCOMB_X1_Y6_N16
A1L5 = A1L44;


--A1L7 is DATA_reg[2]~feeder at LCCOMB_X7_Y6_N16
A1L7 = A1L46;


--A1L11 is DATA_reg[5]~feeder at LCCOMB_X26_Y4_N0
A1L11 = A1L52;


--A1L14 is DATA_reg[7]~feeder at LCCOMB_X5_Y11_N20
A1L14 = A1L56;